Single Action Push Off

I was looking at the State of Texas website for information on the concealed handgun instructor's course.  Under the "what to bring" section of the site it stated that any single action revolvers could not be "push off single action revolvers".  Right away I thought "What is push off?"  I did an Internet search on the phrase push off single action revolvers" and "single action push off" which resulted in quite a bit of information.  I think I was able to translate it to make sense to the layman, like me.  Hopefully it  will help you know what to look for in future purchases also. 

Here in Texas we would call the following "Bubbifying your gun" - 

Push off is something that apparently is more prevalent among Smith and Wessons than other revolvers and is something that seems to only affect single action revolvers.  That is my understanding from the information I was able to find on the condition.

Push off is a condition that occurs when there is negative engagement between the hammer and the trigger.  There are several causes of push off.  Push off can be a simple effect of substantial use or it can be an effect of some "bubba" doing a job on the trigger.

The best I can understand is that you want  a slightly positive engagement.  Slightly is the keyword here because too positive an engagement can cause a whole other problem such a trigger that is stacking.  Basically it seems like all the power that should be going to the hammer is going to the trigger.

Push off allows the hammer to be locked back (single action) while the negative engagement of the hammer and trigger allows the hammer to fall if pressed.  The biggest problem with this condition is it allows the gun to go off accidently if the gun is dropped. 

You can test for push off by having the gun apart, with the hammer and trigger springs removed, to eliminate all outside influences.  However if you are just checking a gun that is not yours to take apart, the following test will do.  First assure the firearm is unloaded then lock the hammer back as if shooting in single action.  With your thumb press forward on the rear of the hammer spur.  Do this as if you are trying to force the hammer forward to fall.  Don't use too much force because you can force the condition if you apply too much force and damage your trigger engagement.  If the hammer falls forward with this amount of pressure then your gun has push off.

Neither push off or stacking (also known as negative or neutral engagement) are acceptable.  They are unsafe conditions and a Smith and Wesson should never be purchased with these conditions. 

If you have a Smith and Wesson with push off it should not be used with live ammo.  You should take the gun to a gun smith and have the condition corrected.

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